Weinstein is also noted for dedication to fans, appearing at hundreds of conventions. He lives in New York with his dog, Mail Order Annie.

In December 2006, it was announced that Weinstein had written a script, "The Sky Above, the Mudd Below," for Star Trek: New Voyages. [X]wbm

Other novels he has written include three in the V Series, East Coast Crisis (with A.C. Crispin), Prisoners and Pawns, and Path to Conquest. He has also written Puppy Kisses are Good for the Soul in 2001 and Mickey Mantle in 2003.

Weinstein wrote several several issues of Marvel Comics's Star Trek: Deep Space Nine and Star Trek: Voyager series, but prefers Star Trek: Deep Space Nine. Weinstein once commented that the series was: "the most interesting Star Trek format that they've come up with yet. You have the space station, which isn't going anywhere, and they're involved with the Cardassians, Bajorans, Klingons, and whoever else might come to the station. They're also involved with the wormhole and what goes on in the Gamma Quadrant. You've got the Jem'Hadar and the Founders to worry about. There's all that, but at the same time, you have the Defiant, and as the TV show has demonstrated, the Defiant can go off and do the classic Star Trek 'exploration' ship shows that the original series and The Next Generation did every week. Plus, you've got all the interaction with Starfleet and what's going on back on Earth. They've done a number of good episodes with that kind of story background. on Deep Space Nine, you can do virtually any kind of Star Trek story. Voyager is a little tougher, I think, because they're a small crew, and on a ship that's too far away from home to have any real interaction with Starfleet. There's not an ongoing political background or context to the show because they're moving along every week, hoping to get closer to home. They dealt with the Kazon on the TV series for the better part of the first couple of seasons, but eventually the producers decided the Kazon weren't all that interesting, and it was time to leave them behind. So for those reasons I really enjoy working with Deep Space Nine. They're an interesting group of characters; they have many conflicts among themselves that they don't paper over and make disappear every week". (The Official Star Trek: Deep Space Nine Magazine Vol. 18)